I used the USB method on T520i with BIOS 1.29/EC 1.22
And some point of BIOS update, i received and error screen.
After that computer booted with new 1.45 BIOS, but the EC was at version 1.22
Using an update with a CD fixed things.

I tried this but was not able to get it to boot for Lenovo T510. I definitely snagged the bootable BIOS but when it burnt out to the USB there was nothing there (is that normal?). When I tried to boot the error message was that there was no OS? Any ideas??